lpc1850-dmamux.txt (1479B)
1NXP LPC18xx/43xx DMA MUX (DMA request router) 2 3Required properties: 4- compatible: "nxp,lpc1850-dmamux" 5- reg: Memory map for accessing module 6- #dma-cells: Should be set to <3>. 7 * 1st cell contain the master dma request signal 8 * 2nd cell contain the mux value (0-3) for the peripheral 9 * 3rd cell contain either 1 or 2 depending on the AHB 10 master used. 11- dma-requests: Number of DMA requests for the mux 12- dma-masters: phandle pointing to the DMA controller 13 14The DMA controller node need to have the following poroperties: 15- dma-requests: Number of DMA requests the controller can handle 16 17Example: 18 19dmac: dma@40002000 { 20 compatible = "nxp,lpc1850-gpdma", "arm,pl080", "arm,primecell"; 21 arm,primecell-periphid = <0x00041080>; 22 reg = <0x40002000 0x1000>; 23 interrupts = <2>; 24 clocks = <&ccu1 CLK_CPU_DMA>; 25 clock-names = "apb_pclk"; 26 #dma-cells = <2>; 27 dma-channels = <8>; 28 dma-requests = <16>; 29 lli-bus-interface-ahb1; 30 lli-bus-interface-ahb2; 31 mem-bus-interface-ahb1; 32 mem-bus-interface-ahb2; 33 memcpy-burst-size = <256>; 34 memcpy-bus-width = <32>; 35}; 36 37dmamux: dma-mux { 38 compatible = "nxp,lpc1850-dmamux"; 39 #dma-cells = <3>; 40 dma-requests = <64>; 41 dma-masters = <&dmac>; 42}; 43 44uart0: serial@40081000 { 45 compatible = "nxp,lpc1850-uart", "ns16550a"; 46 reg = <0x40081000 0x1000>; 47 reg-shift = <2>; 48 interrupts = <24>; 49 clocks = <&ccu2 CLK_APB0_UART0>, <&ccu1 CLK_CPU_UART0>; 50 clock-names = "uartclk", "reg"; 51 dmas = <&dmamux 1 1 2 52 &dmamux 2 1 2>; 53 dma-names = "tx", "rx"; 54};